realNameHidden articles - 173 total
🧠 How Java Handles Memory — What Are Stack, Heap, and Garbage Collection?
Learn how Java handles memory with Stack, Heap, and Garbage Collection. Understand these core Java...
🧠 Mastering Transient vs Volatile in Java: A Beginner’s Guide
Learn the key differences between transient and volatile in Java with simple examples. Understand how...
What Is the Difference Between Fail-Safe and Fail-Fast Iterators?
Overview of Iterators in Java In Java, iterators are objects that allow sequential access to...
Can you have a try without a catch in Java?
Yes, in Java, you can have a try block without a catch block as long as it’s paired with a finally...
Mono in Spring Boot Explained with Simple Examples
🟢 Imagine this scenario: Normally, in Spring Boot (MVC), when you...
What Are Two Types of Casting in Java?
🔹 1. Primitive Casting This is casting between primitive data types (like int, double, float,...
Java 8 — map() vs flatMap()
side-by-side comparison of map() vs flatMap() on the same dataset so you can clearly see the...
mysql stored procedure Example with Spring data jpa
Create the table with Some Records CREATE TABLE `emp_tab` ( `eno` int NOT NULL, `ename`...
🏃♂️ Runners in Spring Boot – What They Are and How to Use Them
🏃♂️ Runners in Spring Boot – What They Are and How to Use Them Ever wondered how to run...
🛠️ Inject Complex Data Types in Spring Boot Using @ConfigurationProperties
🛠️ Inject Complex Data Types in Spring Boot Using @ConfigurationProperties Meta...
Mastering @ConfigurationProperties in Spring Boot: Injecting Configuration in a Clean & Scalable Way
✅ Mastering @ConfigurationProperties in Spring Boot: Injecting Configuration in a Clean...
@Value Annotaion Example in Spring Boot
application.properties spring.application.name=ValueAnnotation hospital.name=Apollo hospital.age...
how to use RestTemplate in a Spring Boot application to make an HTTP GET request
✅ What is RestTemplate? RestTemplate is a synchronous client to perform HTTP requests in a Spring...
How to read Query Param in Spring Boot
Create Project with Spring Web Dependency Directory Structure: pom.xml <?xml version="1.0"...
@Qualifier Example in Spring Boot
In Spring, when you have multiple beans of the same type, Spring gets confused about which one to...
@ControllerAdvice and @ExceptionHandler Annotations Spring Boot
Exception Handling in Spring Boot — A Simple Example 🚀 Spring Boot provides multiple ways to handle...
@Bean annotation example in spring boot
Directory Structure pom.xml <?xml version="1.0" encoding="UTF-8"?> <project...
Example of @Async in Spring Boot for Beginners
The @async annotation in Spring Boot allows you to run tasks asynchronously (in the background)...
any() method in Mockito Spring Boot example
The any() method in Mockito is used as a matcher to specify that any value of a given type can be...
doNothing()method example Spring Boot
When to Use doNothing()? When testing void methods that perform side effects (e.g., sending emails,...
doReturn() method in Mockito example
Spring Boot Example Using doReturn() in Mockito The doReturn() method in Mockito is used when you...
thenThrow() method in Mockito example
Scenario: Mocking a Service to Throw an Exception for Testing Error Handling in a Controller 1....
thenReturn() method in Mockito example
Scenario: Mocking a Service to Test a Controller Application Code Employee.java package...
when() method in Mockito example
Spring Boot example demonstrating the use of when() in unit testing with Mockito. The example covers...
verify() method in Mockito example
The verify() method in Mockito is used to confirm that specific interactions with mocked objects...
List.of() vs Arrays.asList() in java
When working with Java, both List.of() (introduced in Java 9) and Arrays.asList() (available since...
@PreConstruct and @PostConstruct annotation Spring Boot Example
@PostConstruct: This method is called after the Spring bean (in this case, ExampleBean) has been...
With Spring can I make an optional path variable?
Yes, you can make a path variable optional in Spring by using @PathVariable with the required...
Java Stream Scenario Based Interview Question
You have a list of employees with fields like name, age, and department. Write a code snippet to...
Java scenario based interview questions
You have a list of strings: ["apple", "banana", "cherry", "date", "fig", "grape"]. Write a code...